In the united states, the cool polar air masses and the warm tropical air masses come together to form a

a. blizzard.
.b. tornado.
c. hurricane.
d. thunderstorm.

What best explains the inability for life to exist in earth early atmosphere

Ascientist wanted to formulate a pill to attack a specific type of bacteria that infects the throat. which biological component would be best to use as a model for the pill's function? bacteriocytes phagocytes complement antibodies

Which statements best describe the atoms of the gas neon? check all that apply